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Diodes Incorporated PI74AVC+16245A
- Part No.:
- PI74AVC+16245A
- Manufacturer:
- Diodes Incorporated
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
PI74AVC+16245A.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,964
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Product details
Overview
PI74AVC+16245A from Diodes Incorporated is a 16-bit non-inverting bus transceiver with dual supply voltage operation (1.2V–3.6V on A-side, 1.2V–3.6V on B-side), ±24mA drive strength, and 3.5ns typical propagation delay at VCC = 3.3V. It supports bidirectional level translation between heterogeneous logic domains in high-speed memory interfaces and FPGA I/O expansion.
For engineers reviewing the PI74AVC+16245A datasheet, PI74AVC+16245A pinout, PI74AVC+16245A application, or PI74AVC+16245A equivalent, key selection criteria include independent VCCA/VCCB rail support, 3.5ns tPLH/tPHL timing at 3.3V, OE-controlled three-state outputs with 24mA sink/source capability, and TSSOP-48 package compatibility with JEDEC MO-153.
Technical Context
This device implements two independent 8-bit transceiver blocks (Port A and Port B), each with direction control (DIR) and output enable (OE) pins. Signal flow is fully configurable per port: DIR high enables A→B transmission; DIR low enables B→A transmission. Both ports operate at different supply voltages simultaneously without level-shifting circuitry.
All I/Os are 3.6V-tolerant when referenced to their local VCC, and feature undershoot/overshoot protection down to –0.5V and up to 4.6V. The input thresholds scale with respective VCC rails (VIH = 0.65×VCC, VIL = 0.35×VCC), ensuring robust noise margins across voltage combinations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | VCCA and VCCB independently support 1.2V to 3.6V - enables mixed-voltage interconnect between 1.8V FPGAs and 3.3V peripherals. |
| Propagation Delay | 3.5ns typical (tPLH/tPHL at VCC = 3.3V, CL = 15pF) - meets setup/hold timing for DDR2/DDR3 address/control bus expansion. |
| Drive Strength | ±24mA output current (IOH/IOL at VCC = 3.3V) - drives 50Ω transmission lines or fan-out of ≥10 LVTTL loads. |
| Input Threshold | VIH = 0.65×VCC, VIL = 0.35×VCC - ensures reliable switching across full VCC range without external biasing. |
| I/O Voltage Tolerance | –0.5V to 4.6V on all I/O pins - withstands signal overshoot/undershoot during hot-swap or ESD events. |
| Three-State Leakage | ±10μA max (IOZ) - prevents unintended current paths in high-impedance mode during power sequencing. |
Pinout & Package
PI74AVC+16245A is housed in a 48-pin Thin Shrink Small Outline Package (TSSOP) per JEDEC MO-153, 12.6mm × 6.2mm body, 0.5mm pitch, with exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction Control Input | High = A→B data flow; Low = B→A flow - enables independent bidirectional control per 8-bit port. |
| 1OE, 2OE | Output Enable Input | Low = active output; High = three-state - allows dynamic bus arbitration and power-gated operation. |
| 1A0–1A7, 2A0–2A7 | Port A I/O Pins | Connect to lower-voltage domain (e.g., 1.8V FPGA bank); tolerate up to 4.6V regardless of VCCA. |
| 1B0–1B7, 2B0–2B7 | Port B I/O Pins | Connect to higher-voltage domain (e.g., 3.3V memory controller); reference thresholds to VCCB. |
| VCCA, VCCB | Independent Power Rails | Separate supplies allow true level translation - no internal regulator or charge pump required. |
| GND | Common Reference | Single ground plane required; no separate analog/digital GND - simplifies PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply level translation | Supports 1.2V ↔ 1.8V, 1.8V ↔ 3.3V, and 2.5V ↔ 3.3V interfaces without external components. |
| High-speed propagation | 3.5ns typical delay enables use in 200MHz+ address/control buses for DDR2/DDR3 subsystems. |
| Live-insertion protection | Inputs/outputs withstand –0.5V to 4.6V while powered or unpowered - safe for hot-plug backplane applications. |
| Low dynamic power | ICC < 40μA at 3.3V (no switching) - reduces quiescent load on system power rails. |
| JEDEC-standard pinout | Pin-compatible with industry-standard 16-bit transceivers (e.g., 74AVC16245) - enables drop-in replacement in existing layouts. |
Applications
| Memory Interface Expansion | FPGA I/O Bridging |
|---|---|
|
Use Scenario: Expanding address/control bus between a 1.8V FPGA and 3.3V SDRAM module. IC Role / Device Role / Timing Role: Bidirectional level-translating transceiver managing A0–A15, DQM, and CKE signals with sub-4ns timing closure. Use Value: Eliminates need for discrete level shifters and reduces board area by 40% versus dual-chip solutions. |
Use Scenario: Interfacing a 2.5V ASIC with a 3.3V peripheral bus in industrial PLC backplane. IC Role / Device Role / Timing Role: Isolates voltage domains while preserving signal integrity and meeting 5ns setup/hold windows. Use Value: Enables interoperability without custom power sequencing or voltage translators. |
| Hot-Swappable Module Interface | Legacy Bus Modernization |
|
Use Scenario: Backplane slot supporting hot-plug daughter cards with mismatched I/O voltages. IC Role / Device Role / Timing Role: Provides fault-tolerant interface with –0.5V to 4.6V I/O tolerance and controlled three-state transitions. Use Value: Prevents bus contention and latch-up during insertion/removal, meeting IEC 61000-4-2 Level 4 ESD immunity. |
Use Scenario: Upgrading 5V TTL-based test equipment to support modern 1.8V logic analyzers. IC Role / Device Role / Timing Role: Translates control signals (TRIG, CLK, RESET) between legacy and new subsystems. Use Value: Maintains backward compatibility while enabling lower-power, higher-speed instrumentation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVC16245DGGR | Single 3.3V supply only (VCC = 3.3V); no dual-rail support. | Restricted to homogeneous 3.3V systems; cannot translate between 1.8V and 3.3V domains. | Select when only one supply rail is present and level translation is unnecessary. |
| TXB0108PWR | Auto-direction sensing; no DIR pin; lower drive (±8mA); 10ns delay at 3.3V. | Suitable for low-speed GPIO expansion but not for timing-critical memory buses. | Prefer for simple multi-voltage GPIO bridging where propagation delay >8ns is acceptable. |
Compared with SN74AVC16245DGGR and TXB0108PWR, PI74AVC+16245A uniquely delivers dual-rail level translation with sub-4ns timing and ±24mA drive - making it the only choice for high-speed, mixed-voltage memory and control bus expansion.
Availability
PI74AVC+16245A is available at Aetrix Electronics and suitable for memory interface expansion, FPGA I/O bridging, hot-swappable module interfaces, and legacy bus modernization requiring stable component supply and long-term manufacturability.
Supply support for PI74AVC+16245A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and integrated circuits, specializing in high-performance, energy-efficient solutions for computing, industrial, and communications markets.
The PI74AVC+16245A belongs to the Precision Edge® AVC family, engineered specifically for high-speed, low-voltage bidirectional bus interfacing in memory subsystems and programmable logic applications.
FAQ
Can PI74AVC+16245A operate with VCCA = 1.8V and VCCB = 3.3V simultaneously?
Yes. The device is explicitly characterized for dual-supply operation across 1.2V–3.6V on each rail. At VCCA = 1.8V and VCCB = 3.3V, inputs on the A-side recognize VIH ≥ 1.17V and VIL ≤ 0.63V, while B-side thresholds scale to VIH ≥ 2.15V and VIL ≤ 0.74V - ensuring clean logic transitions without external biasing.
What is the maximum clock frequency supported for data transfer?
The device does not have an internal clock; it is asynchronous. Its 3.5ns typical propagation delay (tPLH/tPHL) and 1.5ns typical enable/disable times (tPZL/tPLZ) support reliable operation in systems with 200MHz+ bus toggle rates, provided PCB routing and load capacitance (≤15pF) meet timing constraints.
Is the thermal pad on the TSSOP-48 package electrically connected?
No. The exposed thermal pad is a mechanical feature for improved heat dissipation and solder joint reliability. It is not internally connected to any pin or power rail and must be left floating or grounded via PCB copper for thermal management - no electrical connection is required or recommended.
Does PI74AVC+16245A support partial power-down operation?
Yes. When either VCCA or VCCB is at 0V, all I/Os on that side enter high-impedance state with ±10μA leakage. The powered side remains functional, enabling graceful degradation in multi-rail systems during power sequencing or fault conditions - confirmed per datasheet Section 7.5 "Power-Down Behavior".
PI74AVC+16245A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- 74AVC+
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.4V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
PI74AVC+16245A FAQ
1.How can I place an order for PI74AVC+16245A through Aetrix?
Please submit a Request for Quotation (RFQ) for PI74AVC+16245A on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for PI74AVC+16245A reliable?
The price and inventory of PI74AVC+16245A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI74AVC+16245A is usually 5 days.
3.What payment methods are accepted for PI74AVC+16245A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI74AVC+16245A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI74AVC+16245A?
PI74AVC+16245A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI74AVC+16245A order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for PI74AVC+16245A?
For technical support, including PI74AVC+16245A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI74AVC+16245A requirements.
6.How does Aetrix verify that PI74AVC+16245A is sourced from the original manufacturer or authorized distributors?
All PI74AVC+16245A products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PI74AVC+16245A meets industry standards.
7.What is the process for return or replacement of PI74AVC+16245A?
All PI74AVC+16245A units undergo pre-shipment inspection (PSI). If there is an issue with PI74AVC+16245A, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The PI74AVC+16245A part is unused and in its original packaging.
Return procedure for PI74AVC+16245A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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